LONDON, ENGLAND - MARCH 03: Queen Elizabeth II at a ceremonial welcome for the State Visit of The President of The United Mexican, Senor Enrique Pena Nieto and Senora Rivera on March 3, 2015 in London, England. The President of Mexico, accompanied by Senora Angelica Rivera de Pena, are on a State Visit to the United Kingdom as the guests of Her Majesty The Queen from Tuesday 3rd March to Thursday 5th March. (Photo by Mark Cuthbert/UK Press via Getty Images)